Xin Zhuo

TL;DR: In this article, a four-node corotational quadrilateral elastoplastic shell element is presented, where the two smallest components of each nodal orientation vector are defined as rotational variables, leading to the desired additive property for all nodal variables in a nonlinear incremental solution procedure.

TL;DR: In this paper, a 6-node co-rotational triangular elasto-plastic shell element is developed, where the local coordinate system of the element is defined by the vectors directing from one vertex to the other two vertices and their cross product.

TL;DR: In this paper, a six-node co-rotational curved triangular shell finite element with a novel rotation treatment for folded and multi-shell structures is presented, where rotations are not represented by axial (pseudo) vectors, but by components of polar vectors, of which additivity and commutativity lead to symmetry of the tangent stiffness matrices.